Drier



Patented Sept. l3, I898.

v. n. ANDERSON.

DRIER.

(Application filed Oct. 20, 1897.)

a Shets-Sheet (No Model.)

No. 6l0,5|6. Patented Sept. l3, I898;

' V. D. ANDERS'DN.

DRIER.

( App1ica.tion filed. Oct. 20Y 1897.)

3 Sheets-Sheet 2.

(N0, Modei.)

No. 610,5!6. Patented Sept. l3, I898.

' V. D. ANDERSON.

DRIER.

(Applica tion filed Oct. 20. 12397.,

(No Model.) 3 .Sheets$heet 3.

" UNITED STATES PATENT OFFIcE.

VALERIUS D. Annnnson, on CLEVELAND, OHI O.

DRIER.

SPECIFICATION forming part of Letters Patent No. 610,516, datedSeptember 13, 1898. Application filed October 20, 1897. Serial No.655,822. (No model.)

To all whom it may concern:

Be it known that I, VALERIUS D. ANDER SON, a citizen of the UnitedStates, residing at Cleveland, in the county of Cuyahoga and State ofOhio, have invented certain new and useful Improvements in Driers, ofwhich the following is a specification.

This invention pertains to driers for treat ing distillery slops,brewers grains, slaugh: ter-house refuse, and other masses containing alarge percentage of moisture, together with solids which are of valuefor fertilizing or other purposes.

The object of the invention is to produce a drier of simple, cheap, anddurable construction which may be continuously operated when ofreasonably large size and which, though drying with great rapidity,shall nevertheless avoid all burning or overheating of the matterstreated; V

The construction whichl find best suited to the end in view isillustrated in the accompanying drawings, in which- Figure 1 is aperspective view of the drier; Fig. 2, a side elevation with theheater-cas ing partly broken away; Fig. 3, an elevation looking from theopposite side, the casing partly in section; Fig. 4, a verticaltransverse section.

The structure. comprises a body or shell 1, having parallel verticalwalls connected by semicircular top and bottom .walls, as seen in Figs.1 and 4. The walls areformed of boiler-plate or of iron or steel of likecharacter, using as large sheets as can be conveniently obtained andbending them to form the curved top and bottom portions.

As shown in Figs. 1 and 4, the bottom curve is of greater radius thanthe top curve and its center is set out of vertical plane with that ofthe top, so that while one extremity or edge of the curved wall uniteswith or forms a with its curved bottom is a shaft 3, preferably of theform and construction set forth in Let ters Patent of the United StatesNo. 352,907,

the blades or wings may vary, any common or,

well-known form capable of performing the functions stated beingavailable.

. Extending lengthwise of the shell or chamher 1 from end to end andcommunicating therewith throughout its length by the flue or passage 2is an air-heating chamber 5, at the outer and lower part of which is anairinlet 6, likewise extending the full length of the chamber,preferably.

, Withinthe heating-chamber 5 is a heatingcoil or series of coils 7,which may be of any common form, though the simple manifold or returncoil is cheap and efficient. In practice it is found expedient to employseveral distinct coils, connected to form a series, each coil beingseparated from others by a vertical partition 8 in the chamber 5. Byarranging the partitions to extend alternately from the top of thechamber to Within a short distance of its bottom and from its bottom towithin a few inches of its top there is formed a serpentine or zigzagpassage for the air entering through inlet 6 and escaping through flue2, and the air is caused to pass about each coil or pipe-section in turnand on all sides there of, as will be readily understood upon referenceto Fig. 4.

The chamber 5 maybe divided into sections by transverse partitions 11,as indicated in Figs. 1 and 2, each having its own heatingcoils andcontrolling-valve 12.

It will be noticed also upon referring to Fig.

4. that the lower edge 9 of that side wall of I ISO shaft 3 is providedat one endwith a-belt wheel or pulley 10, Figs. 1, 2, and 3, throughwhich it receives a rapidrotary motion from any convenient prime mover,the direction of rotation being indicated by arrow. The speed ofrotation is such that the material in the bottom of the shell is thrownupward by the 7 blades or beater-s into the upper part of the V shelland separated into comparatively small chamber through flue 2. heatersmove rapidly past the lower side of flue 2 theyinduce an inward flow ofairthrough chamber 1 and at the top thereof.

said fine, and consequently throughchamber 5, which is greatlystrengthened by'an exhaust-fan 13 at the rear end of the shell or 'Asthe air enters chamber 1 through flue 2 it is drawn downward by theheaters or blades and carried beneath the shaft 2 into and through thematters in the bottom of the chamber, thus being brought into the mostintimate contact possible with the matters under treatment. In this waythe air is caused to become laden and saturated with moisture,:and beingpreviously dried and heated it is in the best condition for taking upmoisture.

' The apparatus may of course be made in varying sizes, both as tolength and as to crosssection; but it is more especially designed forhandling large masses'of material, and consequently will ordinarily beof large size, or at least of considerable length, so that the processof drying may be carried on continuously.

In using the apparatus the matters to be treated; are fed into themachine at the forward end, as the machine is viewed in Fig. 1,

through a door 14: or by any common form of feed device, such as a screwconveyer, and is gradually carried toward the rear end, being fullydried in its passage from end to end of the apparatus. This of courserequires a reasonably long travel; but where this is impracticable thefeed and the delivery may be intermittent, the outlet being kept closeduntil the treatment is finished. The material as it enters the chamberof course contains its greatest percentage of moisture and is thereforeleast liable to injury by heat. Hence it is found expedient to employ ahigher temperature in the receiving end of the chamber and to reduce thetemperature as the delivery end is approached. It is for this reasonthat the heating-chamber 5 is divided by partitions 11 and that separatecoils and controllingvalves 12 are furnished.

It will of course be understood that any convenient form of heatingapparatus may be used, the coils being represented merely asillustrative of a type. In many situations the exhaust-steam fromengines will be available for heating the air preparatory to its use inthe chamber 1. In other cases, as where the stock is not liable toinjury thereby, the

products of combustion-that is, the flames.

or the smoke, gases, &c.-from afnrnace may be carried directly into thechamber through V the fine 2, or the air may be carried through a fineor chamber surrounded by theflames and gases.

If desired, the inlet 6 may be controlled by doors or dampers, thoughthis is found une necessary, generally speaking.

Owing to the presence of large and heavy bodiessuch as bones,sticks,stones, and the like-which are frequently foundin garbage, the blades orheaters are occasionally broken, and under former constructions it hasbeen necessary tostop the machine, empty it, out

off the heat, and enter thecasing or shell to V repair or replace thebroken blade. I now provide theshell with a series of manholes oropenings 15, having removable doors or cov ers 16, secured in place bylever-nuts 17,

screwing uponthreaded stems or bolts 18, or by any equivalent fasteningcapable of ready release. These doors being arranged along the Wholelength of the shell above the axis of the beater-shaft and close enoughtogether to permit the attendant to reach all parts of the shaft, it isno longer necessary to empty the shell; but it is sufficient that theshaft 7 be stopped and the proper door removed,

whereupon theinjured blade may be renewed or repaired withoutbodilyentering the chamr V ber,

fected is veryconsiderable, and the exceed- Thesaving in time and laborthusefingly unpleasant task of entering and working within the chamberis avoided.

The form or type of exhausting device here represented by the fan-wheel13 may be va-. ried at will--that is to say, any common and well-knownform of exhausting device may be used.

The machine or apparatus herein described is found to give exceptionallyhigh efficiency in drying and is simple, cheap, and durable inconstruction.

The extension of the edge 9 of the side wall downward past the upperedge of the curved bottom and in close proximity to the heaters preventsthe material thrown off by the beaters from entering the flue 2, and italso serves to give a downward initial direction to the inflowing air.

Having thus described my invention, what I claim is 1. In adrier, thecombination of a chamber; a rotary shaft in the lower part of saidchamber, provided with beaters; an air-inlet on the descending side ofsaid shaft; and a guard covering said inlet and serving to direct theair downward toward the bottom of the chamber, and to exclude materialfrom the inlet.

2. In a drier, the combination of a shell or casing; a rotary beaterlocated within said casing; an air-inlet at one side of the casing; anda shield or guard extending downward from the upper side of theair-inlet to a point near the periphery of the beater; whereby IOO airdrawn in by the beater is directed downward into the mass of material inthe lower part of the casing.

3. In a drier, a shell or casing having upright side walls connected atthe top, and a curved bottom forming a continuation of one side wall butextending outward and upward beyond the lower edge of the other sidewall substantially as shown, whereby an inlet-flue is formed, and thelower edge of the side wall 10 is made to serve as a Wall and guard forsaid flue.

In witness whereof I hereunto set my hand in the presence of twowitnesses.

VALERIUS D. ANDERSON. Witnesses:

GHAs. W. TOLAND, WM. H. DE WITT.

